My experience was that Clear Lake (really just a backed up creek that
did not exist too many years ago) was too shalow to do any sailing.
They dredge very defined channels for the boats to navigate through.
When there is a strong North wind for several days, it literally blows
most of the water out of Clear Lake.

I think you will spend most of your sailing time in Galveston Bay.
Buy a navigation chart of the Bay and I think you will be shocked to
see so much water, and almost all of it is 8 feet deep or less. They
dredge a hugh channel down the middle of it for very large cargo
ships, and yet on either side of the channel, 8 feet. The tide is
about 1 1/2 feet.

We had a lot of work done in a boat yard called South Texas Yacht
Services. You can do as much work their on your own as you want.
Friendly, knowledgeable, and fair in respect to price.

Click here for a posting on our site about our experience there
http://goreads.com/blog/2005/03/hot_...n_houston.html